Ken and Frank Shamrock While actually considered adopted brothers, Ken and Frank grew up alongside one another as troubled kids with an adoptive father who took them under his wing. The brothers became two of MMA's most legendary fighters, but continued to struggle with a relationship outside of the octagon.

Frank Shamrock is without a doubt one of the forefathers of mixed martial arts. He was one of the first fighters to start training in different aspects of t

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awesome WATCH: Frank Shamrock on why it’s time for MMA to become a main stream sport

Frank Shamrock The Most Dangerous Man in the World

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